312000238 - I058 INTERIOR LIGHTS DO NOT GO OFF AT KEY-ON

The interior light works when operated manually, but the timer does not stop when the key is turned ON.
When one of the side doors is opened, the courtesy light timer comes on for 3 minutes and light activation/deactivation is gradual (dimmed). When the vehicle is unlocked after operating the remote control, the courtesy light comes on for 15 seconds, which is interrupted by the key on signal. If the key ON signal is present continuously when opening a door, the courtesy light comes on.
Test results
1INDIVIDUAL BULB CHECKAll OKProblems encounteredOperation
Check the condition of the bulb holder and the operation of the courtesy light switchMove on to Step 21. Front courtesy light fault2. Left front door switch faulty3. Right front door switch fault1. Repair or replace the courtesy light    Op. 7040E10 FRONT COURTESY LIGHT - R+R 2. Repair or replace the left front door switch.3. Repair or replace the right front door switch.
2INTERIOR LIGHTS ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
Check the following, in order:

  • connections between courtesy lights and Body Computer;
  • connection to courtesy light + 30;
  • courtesy light earth connection
    See E2510 COURTESY LIGHTS
Move on to Step 31. Connections not correct2. Earth on courtesy lights defective1. Restore the correct connections    See E2510 COURTESY LIGHTS 2. Restore the correct earth connection    See E2510 COURTESY LIGHTS
3SIGNAL CHECKAll OKProblems encounteredOperation
Check for presence of + 15 on body computer    See E2510 COURTESY LIGHTS Move on to Step 4Signal does not reach Body ComputerRestore the correct power supply to the Body Computer.
4BODY COMPUTER CORRECT OPERATION CHECKAll OKProblems encounteredOperation
Check that the fault is no longer presentEnd of diagnosisBody Computer defectiveReplace Body Computer    Op. 5505A32 BODY COMPUTER - R.R